Determing current dump from output transistors

[Arroyo]

I have acquired a new amplifier and with no reviews all I have to go on for
potential current output is Ic from the output devices. From my figuring
the maximum current potential is the sum of each rails output device rating.
Ex: Ic 10a per device, two devices per rail ( IE pnp, npn ) thus equaling
max current dump of 20 A. Am I figuring correctly?


Thanks in advance

 

[AndrewT]

No,
you have to look at the SOA plot for the device and also take account of the device temperature when this peak current may be demanded.

ESP gives a circuit and method to nondestructively test this peak output current, at normal operating temperature.

 

[ampmade]

Do you want to know the exact available power of your amplifier?

 

[Arroyo]

Trying to obtain available current capacity

Just as I has stated have the rating of the output devices and know the power
supply is more than adequate for these ( actually far in excess). I am thinking
of either using this amplifier with a pair of Apogees that are quite current hungry or finding another amp. Not interested in wasting time trying to
use an amp which will be useless to my cause. My Cal sigs should draw
close to 35 A at full load from my figures..